Who is Pooster the Rooster from Rogue Warrior and what is their importance?

Pooster the Rooster is a veteran from SEAL Team Two, who joins Richard's new unit SEAL Team Six. Pooster is in both the SEAL Team Six unit sent to Beirut and in Red Cell. In the Red Cell, he shows his ability to pick locks and create havoc in an exercise to uncover lapses in base security at the Point Mugu Naval Air Station.